Will a Hifonics Olympus (12) fit and be good or should I go with whatever jl audio has in store for me? Or is there a better sub out there for my truck??
Get a kicker they take the most abuse i have ever seen but not the best in sq but you did not state what the goal was spl or sq. It also depends on the box size, the amp, and the vehicles natural acoustics which will determine whats best for a given vehicle.
